WO2014006690A1

WO2014006690A1 - Voice recognition device

Info

Publication number: WO2014006690A1
Application number: PCT/JP2012/066974
Authority: WO
Inventors: 裕三丸田
Original assignee: 三菱電機株式会社
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2014-01-09
Also published as: US20150120300A1; CN104428766B; DE112012006652T5; JP5925313B2; JPWO2014006690A1; US9269351B2; CN104428766A

Abstract

According to this voice recognition device, for keywords extracted by a voice recognition unit from speech contents of a user, content displayed and number of occurrences of display caused by operations of a user are stored as history information, and by assessing whether or not the same operations and display are performed for a predetermined number of occurrences or more and setting a search level therefor, when the same keyword is subsequently extracted, it is possible to immediately present information of a level demanded by the user. Therefore, it is possible to always efficiently provide detailed information necessary for the user, and accordingly, convenience for the user is improved.

Description

Voice recognition device

The present invention relates to a speech recognition apparatus that recognizes speech spoken by a user and searches for information.

In a speech recognition function installed in a car navigation system or the like, it is common for a passenger (user) to clearly indicate (instruct) the start of an utterance to the system. For this purpose, a button for instructing the start of voice recognition (hereinafter referred to as a voice recognition start instruction section) is displayed on the touch panel or installed on the handle. Then, the voice uttered after the voice recognition start instruction unit is pressed by the passenger (user) is recognized. That is, the voice recognition start instruction unit outputs a voice recognition start signal, and when the voice recognition unit receives the signal, the passenger (user) speaks from the voice data acquired by the voice acquisition unit after receiving the signal. A speech section corresponding to the content is detected and speech recognition processing is performed.

However, there is a voice recognition device that always recognizes the content spoken by the passenger (user) even if there is no voice recognition start instruction from the passenger (user). That is, the voice recognition unit detects the voice section corresponding to the content spoken by the passenger (user) from the voice data acquired by the voice acquisition unit without receiving the voice recognition start signal, and the voice section A feature amount of voice data is extracted, a recognition process is performed using a recognition dictionary based on the feature amount, and a process of outputting a character string of a voice recognition result is repeatedly performed. Alternatively, the database is searched based on the character string and the search result is displayed.

For example, in Patent Document 1, a voice uttered by a user is always input and voice recognition is performed, and the recognition result is displayed. Thereafter, the user performs a determination operation using an operation button, thereby executing processing based on the recognition result. A speech recognition apparatus is disclosed.

Japanese Patent Laid-Open No. 2008-14818

However, for example, the conventional speech recognition apparatus such as Patent Document 1 has a problem that when the same utterance is recognized, only the search result of the same level is always displayed. That is, for example, when the user speaks “gas station”, the store name and location of the nearby gas station are always displayed. In order for the user to know the price for each gas station, a predetermined operation is performed each time. There was a problem that it had to be done separately.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a voice recognition device that can immediately present information at a level required by a user.

In order to achieve the above object, a speech recognition apparatus according to the present invention detects a speech uttered by a user and acquires a speech by recognizing speech data acquired by the speech acquisition unit. Based on a voice recognition unit, an operation input unit that receives an operation input from the user, a display unit that presents information to the user, information received by the operation input unit, and information displayed on the display unit The operation response analysis unit that identifies the user's operation, and the display contents displayed on the display unit and the number of times displayed by the operation identified by the operation response analysis unit for each keyword extracted by the voice recognition unit Is extracted by the voice recognition unit according to the history information stored in the operation display history storage unit. A search level setting unit for setting a search level of the keyword, and according to the search level set by the search level setting unit, information is searched using the keyword extracted by the voice recognition unit as a search key, and the search result is obtained. An information search control unit to acquire, and an information presentation control unit for giving an instruction to display the search result acquired by the information search control unit on the display unit, wherein the search level setting unit is the voice recognition unit The search level is changed when the number of display times in the history information stored in the operation display history storage unit exceeds a predetermined number for the keywords extracted by the above.

According to the speech recognition apparatus of the present invention, it is possible to immediately present information at the level required by the user, and it is possible to efficiently provide detailed information necessary for the user at all times, so that convenience for the user is improved.

It is a figure which shows the example of a display screen of a navigation apparatus. 1 is a block diagram illustrating an example of a voice recognition device according to Embodiment 1. FIG. It is a figure which shows the example of a definition of a search level. It is a figure which shows the example of the search level for every keyword set to the information search control part. It is a figure which shows the operation history and display history by the user for every keyword memorize | stored in the operation display history memory | storage part. 3 is a flowchart showing the operation of the speech recognition apparatus in the first embodiment. It is a figure which shows the example in which an operation history and a display history are updated about one keyword (gas station) memorize | stored in the operation display history memory | storage part. It is a figure which shows the example of a display of a search result. It is a block diagram which shows an example of the speech recognition apparatus by Embodiment 2. 10 is a flowchart showing the operation of the speech recognition apparatus in the second embodiment. FIG. 10 is a block diagram illustrating an example of a voice recognition device according to a third embodiment. 10 is a flowchart illustrating the operation of the speech recognition apparatus according to Embodiment 3. It is a block diagram which shows an example of the speech recognition apparatus by Embodiment 4. 10 is a flowchart showing the operation of the speech recognition apparatus in the fourth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, a description will be given of a navigation device incorporating a speech recognition device as a premise of the present invention. FIG. 1 is a diagram illustrating an example of a display screen of a general navigation device.

For example, in a vehicle in which the navigation device is mounted, the following conversation is performed in a state where a map for normal road guidance and the vehicle mark 71 are displayed on the screen 70 of the navigation device. Suppose.
User A: “Soon gasoline will run out”
User B: “Is there a gas station nearby?”

Then, a genre name icon 72 corresponding to the genre name included in the utterance content (in this example, “gas station”) is displayed on the screen 70 of the navigation device (FIG. 1A). When the user presses the icon 72, a gas station around the current location is searched, and for example, the name and address of the gas station are displayed as a search result list 73 as a search result (FIG. 1B).

Subsequently, when the user selects one of the displayed search results, the location information of the selected gas station is displayed as a facility mark 74, and detailed information of the gas station, such as business hours and gasoline, is displayed. Detailed buttons 75 (for example, “business hours” button 75a and “price” button 75b) for displaying the price and the like are displayed (FIG. 1C). Here, when the user presses the “business hours” button 75a, the business hours of the gas station are displayed (FIG. 1D).

In all of the following embodiments, a facility search by genre such as the above-described gas station will be described as an example. However, information to be searched in the present invention is not limited to this facility information, and traffic information , Weather information, address information, news, music information, movie information, program information, and the like.

Embodiment 1 FIG.
FIG. 2 is a block diagram showing an example of a speech recognition apparatus according to Embodiment 1 of the present invention. This voice recognition device is used by being incorporated in a navigation device mounted on a vehicle (moving body), and includes a voice acquisition unit 1, a voice recognition unit 2, a voice recognition dictionary 3, an information database 4, and information search control. Unit 5, information presentation control unit 6, display unit 7, operation input unit 8, operation response analysis unit 9, operation display history storage unit 10, and search level setting unit 11.

The voice acquisition unit 1 takes in a user utterance collected by a microphone, that is, an input voice, and performs A / D (Analog / Digital) conversion by PCM (Pulse Code Modulation), for example.

The voice recognition unit 2 detects a voice section corresponding to the content uttered by the user from the voice signal digitized by the voice acquisition unit 1, extracts a feature quantity of voice data in the voice section, and uses the feature quantity as the feature quantity. Based on this, a recognition process is performed using the speech recognition dictionary 3, and a character string as a speech recognition result is output. The recognition process may be performed using a general method such as an HMM (Hidden Markov Model) method.

Incidentally, in a voice recognition function installed in a car navigation system or the like, it is common for a user to clearly indicate (instruct) the start of an utterance to the system. For this purpose, a button for instructing the start of voice recognition (hereinafter referred to as a voice recognition start instruction section) is displayed on the touch panel or installed on the handle. Then, the voice uttered after the user presses the voice recognition start instruction unit is recognized. That is, the voice recognition start instruction unit outputs a voice recognition start signal, and when the voice recognition unit receives the signal, it corresponds to the content uttered by the user from the voice data acquired by the voice acquisition unit after receiving the signal. The speech section to be detected is detected, and the above-described recognition process is performed.

However, the voice recognition unit 2 in the first embodiment always recognizes the content spoken by the user without the voice recognition start instruction by the user as described above. That is, even if the voice recognition unit 2 does not receive the voice recognition start signal, the voice recognition unit 2 always uses the voice data acquired by the voice acquisition unit 1 from the voice data acquired by the voice acquisition unit 1 when the navigation device incorporating the voice recognition device is activated. A speech section corresponding to the content uttered is detected, a feature amount of speech data in the speech section is extracted, a recognition process is performed using the speech recognition dictionary 3 based on the feature amount, and a character string of a speech recognition result The process of outputting is repeated. The same applies to the following embodiments.

The information database 4 stores at least one of facility information, address information, song information, and the like. The facility information includes, for example, the facility name, the genre to which the facility belongs, position data, business hours, the presence / absence of a parking lot, the address information includes, for example, an address, position data, etc. Includes information such as name, artist name, song title, and age. Here, the information database 4 is described as having the facility information stored therein, but it may be traffic information, weather information, address information, news, music information, movie information, program information, and the like. The information database 4 may be stored in, for example, an HDD or a flash memory, or may be on a network and accessed via communication means (not shown).

The information search control unit 5 searches the information database 4 using the keyword output by the voice recognition unit 2 according to the search level set by the search level setting unit 11 described later, and acquires information. Here, the search level is an index representing how much detailed information is acquired from the information database 4 (which hierarchy), and is defined for each keyword.

Figure 3 shows an example of search level definition. For example, when searching using the keyword “gas station” as a search key, if the set search level is “1”, the facility name and address information are acquired, and if the search level is “2”, the facility name In addition to address information, information on at least one specified item of business hours or gasoline prices is acquired. When the search level is not set, the information search control unit 5 does not perform a search process. The search level “0” may be set so that the search level is not set.

FIG. 4 shows an example of the search level for each keyword set in the information search control unit 5 by the search level setting unit 11 described later. Here, when there are a plurality of items at the same search level, such as the keyword “gas station” in FIG. 3, one item may be set as additional information as shown in FIG. 4A. In this case, business hours information is acquired in addition to the facility name and address information. Further, as shown in FIG. 4B, a plurality of items may be set as additional information. If only the search level is set, information may be acquired for all items of that level.

The information presentation control unit 6 gives an instruction to display the search result acquired by the icon or the information search control unit 5 on the display unit 7 described later according to the search level. Specifically, when the search level is not set, the genre name icon 72 as shown in FIG. 1A is displayed. When the search level is set, the information is acquired by the information search control unit 5. The search results are displayed like a search result list 73 shown in FIG.

The display unit 7 is a display-integrated touch panel, and includes, for example, an LCD (Liquid Crystal Display) and a touch sensor, and displays a search result according to an instruction from the information presentation control unit 6. Further, the user can operate by directly touching the display unit (touch panel) 7.

The operation input unit 8 is an operation key, an operation button, a touch panel, or the like that receives an operation input from a user and inputs the instruction to the in-vehicle navigation device. Various instructions by the user are recognized by the hardware switch provided in the in-vehicle navigation complex device, the touch switch set and displayed on the display, or the remote control installed on the handle or other remote control The thing by an apparatus etc. is mentioned.

The operation response analysis unit 9 specifies a user operation based on information received by the operation input unit 8 and information on a screen displayed on the display unit 7. The identification of the user's operation is not an essential matter of the present invention, and a description thereof is omitted because a known technique may be used.

For each keyword extracted by the speech recognition unit 2, the operation display history storage unit 10 displays the display contents displayed on the display unit 7 by the user's operation specified by the operation response analysis unit 9 and the number of times of display thereof, as history information. As a storage unit. FIG. 5 shows history information by the user for each keyword stored in the operation display history storage unit 10. For example, as shown in FIG. 5, the content displayed by the user's operation and the number of times the content is displayed are stored for each keyword as shown in FIG. 5, and when the user's operation is specified by the operation response analysis unit 9, The number of times for the displayed content is incremented and saved.

The search level setting unit 11 refers to the history information stored in the operation display history storage unit 10 and sets a search level for each keyword used as a search key in the information search control unit 5 according to the history information. . Here, it is assumed that the search level set in the information search control unit 5 is a level corresponding to display contents that are equal to or greater than the predetermined display count (or display contents that exceed the predetermined display count). And about the keyword extracted by the speech recognition part 2, when the frequency | count of display in the historical information memorize | stored in the operation display history memory | storage part 10 becomes more than predetermined number, a search level is changed, Every time the number of display times exceeds a predetermined number, the search level is raised.

For example, when the predetermined number of times as the threshold is 3 times, in the keyword “gas station” shown in FIG. 5, the name / address display of level 1 is 6 times, the business hours display of level 2 is 2 times, the price Since the display is 0 times, a search level “1” (see FIG. 3) for searching for a name / address corresponding to the predetermined number of times 3 times or more is set. In addition, if the user performs an operation for displaying business hours at this time, the number of business hours displayed is updated to three, so that the next time the keyword “gas station” is extracted, the business hours are displayed. Since the number of times is the predetermined number of times 3 or more, the search level is raised to “2”.

In addition, when there are a plurality of display counts exceeding the predetermined count, for example, the search level for the display content with the deepest hierarchy may be set. For example, if the predetermined number of times as the threshold is also set to 3 times, in the keyword “convenience store” shown in FIG. 5, the name / address display of level 1 is 5 times, and the business hours display and recommended product display of level 2 are both Since it is four times, the search level “2” (refer to FIG. 3) for searching for business hours and recommended products corresponding to the predetermined number of times three or more and the deepest display content is set.

Here, the predetermined number of times as the threshold has been described as being 3 times, but the same value may be used for all keywords, or a different value may be used for each keyword.
The search level setting method shown here is an example, and a search level determined by another method may be set.

Next, the operation of the speech recognition apparatus according to the first embodiment will be described using the flowchart shown in FIG.
First, the voice acquisition unit 1 takes in a user utterance collected by a microphone, that is, an input voice, and performs A / D conversion using, for example, PCM (step ST01).
Next, the voice recognition unit 2 detects a voice section corresponding to the content spoken by the user from the voice signal digitized by the voice acquisition unit 1, extracts a feature amount of the voice data of the voice section, and A recognition process is performed using the speech recognition dictionary 3 based on the feature amount, and a character string serving as a keyword is extracted and output (step ST02).

When the search level is set by the search level setting unit 11 (in the case of YES at step ST03), the information search control unit 5 uses the keyword output by the voice recognition unit 2 according to the search level as a search key. The information database 4 is searched and information is acquired (step ST04). Thereafter, the information presentation control unit 6 instructs the display unit 7 to display the search result acquired by the information search control unit 5 (step ST05).

On the other hand, when the search level is not set (NO in step ST03), an icon corresponding to the keyword is displayed (step ST06).
Subsequently, when the display screen is operated by the user via the operation input unit 8, the operation response analysis unit 9 analyzes the operation, specifies the user's operation (step ST07), and specifies the search keyword. The operation history and display history stored in the operation display history storage unit 10 are updated by incrementing the number of times displayed by the user's operation (step ST08).

The search level setting unit 11 determines whether or not the number of display contents stored in the operation display history storage unit 10 for the keyword extracted in step ST02 is equal to or greater than a predetermined number that is a preset threshold value. Is determined (step ST09). When it is determined that there is no display content more than the predetermined number of times (in the case of NO in step ST09), the process returns to step ST01. On the other hand, if it is determined that there is display content that is a predetermined number of times or more (YES in step ST09), the search level is determined based on the content, and the search level is set for the information search control unit 5. (Step ST10).

Next, a specific example will be described. For the sake of explanation, it is assumed that, in the initial state, the search level is not set in the information search control unit 5 and the number of screen display times for each keyword is all zero. In addition, the “predetermined number of times” used as a threshold value for determination in the search level setting unit 11 is set to two times.

For example, in a car equipped with a navigation device, a screen for normal road guidance and a vehicle mark 71 are displayed on the screen 70 of the navigation device.
User A: “Soon gasoline will run out”
User B: “Is there a gas station nearby?”
Assuming that the above conversation is made, the voice signal digitized by the voice acquisition unit 1 is recognized by the voice recognition unit 2, and the keyword “gas station” is extracted and output (step ST01, step ST02).

Here, in the initial state as described above, the search level for the keyword “gasoline station” is not set in the information search control unit 5, so the information search control unit 5 does not search the information database 4 (in step ST03). In the case of NO). Then, a display corresponding to the search level not set, that is, a genre name icon 73 of “gas station” is displayed on the screen 70 of the display unit 7 as shown in FIG. 1A, for example (step ST06).

1 (a), (b), and (c) are performed by the user, and when the screen as shown in FIG. 1 (d) is displayed, the operation response analysis unit 9 performs the operations shown in FIGS. b) It is specified that the name / address display and business hours are displayed by the operation of (c), and the number of the name / address display and business hours display is incremented for the keyword “gas station”, and the operation display history storage unit 10 contents are updated (step ST07, step ST08). As a result, for the keyword “gas station”, the operation display history storage unit 10 stores a history of “1” for name / address display, “1” for business hours display, and “0” for price display. The

Further, if the user performs the conversation as described above and displays the name and address at another time, the information stored in the operation display history storage unit 10 is the keyword as shown in FIG. The name / address display count “2”, the business hours display count “1”, and the price display count “0” for the “gas station”, and the name / address display count is a predetermined number of times “2”. Therefore, the search level “1” is set for the information search control unit 5 (step ST09, step ST10).

Further, when the user has a conversation as described above at another time, the search level “1” is set in the information search control unit 5 for the keyword “gas station”. Is obtained, and the search result list 73 is displayed as a search result as shown in FIG. 8A (in the case of YES in step ST03, step ST04, step ST05). Here, when the user selects one of the search results, a screen shown in FIG. 1C is displayed. Further, as shown in FIG. 7B, the information stored in the operation display history storage unit 10 includes the name / address display count “3”, the business hours display count “2”, and the price display count “ The content is “0”, and the number of times the business hours are displayed is equal to or greater than the predetermined number “2”, which is the threshold value. Therefore, the search level “2” and the additional information “business hours” are set for the information search control unit 5.

Similarly, when the information stored in the operation display history storage unit 10 is as shown in FIG. 7B, when the user has a conversation as described above, the keyword “gas station” Since the search level “2” and the additional information “business hours” are set in the information search control unit 5, business hours are acquired from the information database 4, and the business hours as shown in FIG. The included search result list 73 is displayed. Here, when the user selects one of the search results, the screen shown in FIG. 1D is displayed.

Further, as shown in FIG. 7C, the information stored in the operation display history storage unit 10 includes the number of times of name / address display “4”, the number of business hours display “2”, and the number of price display “2”. ", All items are equal to or greater than the predetermined number of times" 2 "which is a threshold used for determination in the search level setting unit 11, so that the search level" 2 "and additional information" “Business hours” and “Price” (or no additional information) are set.

In this state, when the user further has a conversation as described above, the information search control unit 5 searches the keyword “gas station” at the search level “2”, the additional information “business hours” and “price” (or no additional information). ) Is set, the business hours and prices are acquired from the information database 4, and the search result list 73 including the business hours and prices as shown in FIG. 8C is displayed as a search result.

As described above, according to the first embodiment, for the keywords extracted by the speech recognition unit from the utterance contents of the user, the contents and the number of times displayed by the user's operation are stored as history information. When the user looks at the information of the “gas station”, the same operation is performed by determining whether or not the same operation and display have been performed more than a predetermined number of times, such as checking the business hours every time. When a keyword is extracted, information at a level required by the user can be presented immediately, and detailed information necessary for the user can always be efficiently provided, so that convenience for the user is improved.

Embodiment 2. FIG.
FIG. 9 is a block diagram showing an example of a speech recognition apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the structure similar to what was demonstrated in Embodiment 1, and the overlapping description is abbreviate | omitted. In the second embodiment shown below, compared with the first embodiment, the sound setting unit 12 is further provided, and the number of times the user displays the information for the keyword recognized by the voice recognition unit 2 is a predetermined number or more (or If the predetermined number of times is exceeded, the user is alerted.

When the search level setting unit 11 sets a search level “1” or higher (or larger than a predetermined value), the information search control unit 5 is based on the number of times the user displays information on the keyword recognized by the voice recognition unit 2. When the search level is set), the ring setting unit 12 is instructed to output.
When the ringing setting unit 12 receives an instruction from the information search control unit 5, the ringing setting unit 12 changes the setting of the navigation device to perform a predetermined output. Here, the predetermined output refers to, for example, a predetermined vibration or sound output such as a vibration of a seat, an output of a notification sound, and a sound output indicating that the keyword is recognized.

Next, the operation of the speech recognition apparatus according to the second embodiment will be described using the flowchart shown in FIG.
The processing from steps ST11 to ST19 is the same as steps ST01 to ST09 in the flowchart of FIG.
Then, when it is determined that there is display content whose operation history and display history are a predetermined number of times or more for the keywords extracted by the speech recognition unit 2 (in the case of YES in step ST19), as in the first embodiment. The search level is set (step ST20), and then the ring setting unit 12 changes the ring setting and performs a predetermined output (step ST21).

As described above, according to the second embodiment, for a keyword extracted by the speech recognition unit from the user's utterance content, the user can display information about the keyword in the past more than a predetermined number of times (or beyond the predetermined number of times). If it is determined that the search is performed, that is, according to the search level of the keyword, the ringing setting unit performs a predetermined output by vibration or voice to alert the user. It is possible to appropriately recognize that detailed information tailored to is immediately presented.

Embodiment 3 FIG.
FIG. 11 is a block diagram showing an example of a speech recognition apparatus according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the structure similar to what was demonstrated in

Embodiment

1, 2, and the overlapping description is abbreviate | omitted. In the third embodiment described below, when compared with the second embodiment, the search level initialization unit 13 is further provided, and the user wants to initialize the history information stored in the operation display history storage unit 10. Can be initialized by speaking.

The voice recognition dictionary 3 is further configured to recognize keywords such as “initialization” and “reset” which mean commands that return history information stored in the operation display history storage unit 10 to an initial state. The voice recognition unit 2 outputs the keyword as a recognition result.
The search level initialization unit 13 extracts history information stored in the operation display history storage unit 10 when the voice recognition unit 2 extracts a keyword indicating a command for returning to an initial state such as “initialization” and “reset”. Is initialized.

Next, the operation of the speech recognition apparatus according to the third embodiment will be described using the flowchart shown in FIG.
Steps ST31 to 32 and steps ST35 to ST42 are the same as steps ST11 to 12 and steps ST13 to ST20 in the flowchart of FIG.

If the keyword extracted by the voice recognition unit 2 in step ST32 is a keyword meaning a command for returning to the initial state such as “initialization” and “reset” (YES in step ST33), the operation display history storage is performed. The information stored in unit 10 is initialized, that is, returned to the initial state (step ST34). If it is a keyword other than that, the process after step ST35 is performed.

As described above, according to the third embodiment, the keyword extracted from the user's utterance content by the voice recognition unit is a keyword meaning a command for returning to the initial state such as “initialization” and “reset”. In this case, since the history information stored in the operation display history storage unit is initialized, the display of detailed information according to the search level is not as expected, or the user changes For example, when the user wants to initialize, the content of the operation display history storage unit can be returned to the initial state only by speaking a keyword meaning this command.

Embodiment 4 FIG.
FIG. 13 is a block diagram showing an example of a speech recognition apparatus according to Embodiment 4 of the present invention. Note that the same components as those described in the first to third embodiments are denoted by the same reference numerals, and redundant description is omitted. In Embodiment 4 shown below, compared with Embodiment 1, the speaker identification part 14 is further provided and the log | history information referred for every speaker (user who spoke) is changed.

The speaker identification unit 14 analyzes the voice signal digitized by the voice acquisition unit 1 and identifies the speaker (the user who spoke). Here, the speaker identification method is not an essential matter of the present invention, and a known technique may be used.

The operation display history storage unit 10 holds history information as shown in FIG. 5 for each user. Then, when a speaker (speaking user) is identified by the speaker identifying unit 14, the history information corresponding to the identified user is validated. Since other processes are the same as those in the first embodiment, description thereof is omitted. It is assumed that the speaker identified by the speaker identification unit 14 is a user who operates the operation input unit 8.

The search level setting unit 11 refers to the history information stored in the operation display history storage unit 10 that is valid, and the keyword used as a search key in the information search control unit 5 according to the history information. Set the search level for each.

Next, the operation of the speech recognition apparatus according to the fourth embodiment will be described using the flowchart shown in FIG.
First, the voice acquisition unit 1 takes in a user utterance collected by a microphone, that is, an input voice, and performs A / D conversion using, for example, PCM (step ST51).
Next, the speaker identification unit 14 analyzes the voice signal captured by the voice acquisition unit 1 and identifies the speaker (step ST52).

Then, the operation response analysis unit 9 validates the history information corresponding to the speaker identified by the speaker identification unit 14 from the operation display history storage unit 10 (step ST53).
The subsequent processing of steps ST54 to ST62 is the same as steps ST02 to ST10 of the flowchart shown in FIG.

As described above, according to the fourth embodiment, the speaker is identified by the user's utterance, the search level is set with reference to the history information stored for each utterer, and the detailed information corresponding thereto is obtained. Since the information is displayed, even if the user who uses the navigation device in which the voice recognition device is incorporated changes, the level of information required by each user can be presented immediately, and detailed information that is always necessary for the user. Can be provided efficiently, and the convenience for the user is further improved.

In the above embodiment, the user's utterance content is always recognized. However, for a predetermined period (for example, while the user presses a button for voice recognition and the button is pressed, Alternatively, voice recognition may be performed only for a predetermined time after the button is pressed. Further, the user may be able to set whether to always recognize or recognize only for a predetermined period.

However, as in the above embodiment, when a navigation device incorporating a voice recognition device is activated even if the user is not conscious, by performing voice acquisition and voice recognition at all times, If there is an utterance, voice acquisition and voice recognition are automatically performed, keywords are extracted from the voice recognition results, a search level is set, and information at the level requested by the user is immediately displayed. Detailed information necessary for the user can always be efficiently provided without requiring the user's manual operation or input intention to start speech recognition.

In the above embodiment, the voice recognition device is described as being incorporated in a vehicle-mounted navigation device. However, the device in which the voice recognition device of the invention is incorporated is not limited to a vehicle-mounted navigation device, It is possible to search and display information through dialogue between the user and the device, such as a navigation device for a moving body including a vehicle, a railroad, a ship or an aircraft, a portable navigation device, a portable information processing device, etc. Any device can be applied as long as it is a device.

In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

The device in which the voice recognition device of the present invention is incorporated is not limited to a vehicle-mounted navigation device, but a navigation device for a mobile object including a person, a vehicle, a railroad, a ship or an aircraft, a portable navigation device, and portable information. The present invention can be applied to any form as long as the apparatus can search and display information through a dialogue between the user and the apparatus, such as a processing apparatus.

1 voice acquisition unit, 2 voice recognition unit, 3 voice recognition dictionary, 4 information database, 5 information search control unit, 6 information presentation control unit, 7 display unit, 8 operation input unit, 9 operation response analysis unit, 10 operation display history Storage section, 11 Search level setting section, 12 Ringing setting section, 13 Search level initialization section, 14 Speaker identification section, 70 Navigation device screen, 71 Vehicle mark, 72 Genre name icon, 73 Search result list, 74 facilities Mark, 75 details button.

Claims

A voice acquisition unit for detecting and acquiring voice spoken by the user;
A voice recognition unit that recognizes voice data acquired by the voice acquisition unit and extracts keywords;
An operation input unit that receives an operation input from the user;
A display unit for presenting information to the user;
Based on the information received by the operation input unit and the information displayed on the display unit, an operation response analysis unit that identifies the user's operation;
For each keyword extracted by the voice recognition unit, an operation display history storage unit that stores the display content displayed on the display unit by the operation specified by the operation response analysis unit and the number of display times as history information;
A search level setting unit that sets a search level of a keyword extracted by the voice recognition unit according to history information stored in the operation display history storage unit;
An information search control unit that searches for information using the keyword extracted by the voice recognition unit as a search key and obtains a search result according to the search level set by the search level setting unit;
An information presentation control unit that gives an instruction to display the search result acquired by the information search control unit on the display unit,
The search level setting unit sets the search level when the number of displays in the history information stored in the operation display history storage unit exceeds a predetermined number of times for the keyword extracted by the voice recognition unit. A voice recognition device characterized by being changed.
The search level setting unit sets the search level for the keyword extracted by the voice recognition unit each time the number of display times in the history information stored in the operation display history storage unit is equal to or greater than the predetermined number. The speech recognition apparatus according to claim 1, wherein
The information searched by the information search control unit using the keyword extracted by the voice recognition unit as a search key is any of facility information, traffic information, weather information, address information, news, music information, movie information, or program information. The speech recognition apparatus according to claim 1, wherein:
A speaker identification unit that identifies a user who utters the voice acquired by the voice acquisition unit;
The operation display history storage unit stores history information for each user, validates the user history information specified by the speaker identification unit,
The speech recognition apparatus according to claim 1, wherein the search level setting unit sets the search level with reference to history information validated in the operation display history storage unit.
The speech recognition apparatus according to claim 1, further comprising a ringing setting unit that alerts the user by vibration or voice according to the search level.
A search level initialization unit for returning history information stored in the operation display history storage unit to an initial state when the keyword extracted by the voice recognition unit is a keyword meaning a command to return to an initial state; The speech recognition apparatus according to claim 1, further comprising: